Toyota Tacoma (2015-2018) Service Manual: System Description
SYSTEM DESCRIPTION
1. FRONT PASSENGER OCCUPANT CLASSIFICATION SYSTEM
(a) General Description
(1) The front passenger occupant detection ECU determines whether the front passenger seat is occupied by an adult or child (with child seat) or is unoccupied, based on the load that is applied to the front passenger seat and whether the seat belt is buckled. The system restricts the deployment of the front passenger airbag, front passenger side airbag, and the front passenger seat belt pretensioner in accordance with this judgment. The result is informed to the driver through the airbag ON/OFF indicator illumination.
(b) System Configuration
(1) This system consists of the occupant detection ECU, occupant classification sensors, airbag ON/OFF indicator, seat belt buckle switches, and airbag sensor assembly.
(c) Occupant Detection ECU and Sensor
(1) The occupant classification sensors are installed on four brackets connecting the seat rail and the seat frame. The resistance values of these sensors, which vary in accordance with the load that acts on the brackets, are transmitted to the occupant detection ECU as signals. Upon receipt of the signals, the ECU determines the front passenger seat occupant conditions.
Initialization
INITIALIZATION
1. ZERO POINT CALIBRATION
NOTICE:
Make sure that the front passenger seat is not occupied before performing the
operation.
HINT:
Perform the zero point calibration and sensitivit ...
System Diagram
SYSTEM DIAGRAM
...
Other materials:
Dtc Check / Clear
DTC CHECK / CLEAR
1. CHECK DTC
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine / Trouble Codes.
(e) Check for DTCs, and then write them down.
(f) Check the details of the DTCs (See page ...
Customize Parameters
CUSTOMIZE PARAMETERS
PROCEDURE
1. CUSTOMIZE POWER WINDOW CONTROL SYSTEM
HINT:
The following items can be customized.
NOTICE:
When the customer requests a change in a function, first make sure that
the function can be customized.
Record the current settings before customizing.
...
On-vehicle Inspection
ON-VEHICLE INSPECTION
PROCEDURE
1. INSPECT LOWER NO. 1 INSTRUMENT PANEL AIRBAG ASSEMBLY (for Vehicle not Involved
in Collision)
(a) Perform a diagnostic system check (See page
).
(b) With the lower No. 1 instrument panel airbag assembly ...
